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INDONESIA
JURNAL KIMIA SAINS DAN APLIKASI
Published by Universitas Diponegoro
ISSN : 14108917     EISSN : 25979914     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering
urnal Kimia Sains dan Aplikasi (p-ISSN: 1410-8917) and e-ISSN: 2597-9914) is published by Department of Chemistry, Diponegoro University. This journal is published four times per year and publishes research, review and short communication in field of Chemistry.
Arjuna Subject : -
Articles 796 Documents
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Daya Pemacu Pertumbuhan Monosodium Glutamat dan Efek Sampingnya pada Ren Ayam (Gallus sp) Muliani, Hirawati
Jurnal Kimia Sains dan Aplikasi Vol 9, No 2 (2006): Volume 9 Issue 2 Year 2006
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (391.301 KB) | DOI: 10.14710/jksa.9.2.45-54

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh monosodium glutamat terhadap pertumbuhan ayam petelur betina dan untuk mengetahui efek sampingnya terhadap ren. Dua puluh empat ekor ayam petelur betina diaklimasi selama 3 minggu. Ayam-ayam tersebut kemudian dikelompokkan menjadi 4 kelompok perlakuan, dengan 6 ulangan dalam tiap kelompok. Perlakuan yang diberikan adalah 0 mg; 7,5 mg; 15 mg; 22,5 mg monosodium glutamat per oral sekali sehari selama 3 minggu. Parameter utama yang diamati adalah pertambahan bobot badan, tinggi sel epitelium tubulus kontortus proksimalis, tinggi sel epitelium tubulus kontortus distalis, dan perubahan struktur glomerulus. Parameter penunjang yang diamati adalah berat ren pada akhir perlakuan. Data kuantitatif yang didapat dianalisis dengan analisis varians dengan Rancangan Acak Lengkap dan Uji Beda Nyata Terkecil. Hasil yang didapat menunjukkan bahwa monosodium glutamat dapat memacu pertumbuhan ayam petelur betina tetapi menyebabkan efek samping terjadinya glomerulonefritis pada ren.
Assessing the Composition of 19th Century Lime Mortars from a Mission Chapel in the Former Hacienda de San Isidro de Mariquina Philippines Jan-Michael Cayme; Renz Matthew L. L. Aurellano; Carmen Luisa P. Cabral; Gellyn Ann R. Alonzo; Aniano N. , Jr. Asor
Jurnal Kimia Sains dan Aplikasi Vol 21, No 3 (2018): Volume 21 Issue 3 Year 2018
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3375.468 KB) | DOI: 10.14710/jksa.21.3.131-138

Abstract

This paper presents the results of a chemical study on lime mortars manufactured during the Spanish Colonial Period in the Philippines. Lime mortar samples, MRK-01 and MRK-02, were obtained from the facade of a historical mission chapel in Marikina City. The nature of the aggregate and binder components in these mortar samples were determined by performing sieve analysis and classified to be poorly graded with uniform gradation. An aggregate to binder ratio of approximately 1:1 was computed based on the solubility of the individual sieved fractions in hydrochloric acid. The silicate character of the aggregate was confirmed by the absorbance peaks attributed to silicon dioxide (SiO2) in the Fourier Transform Infrared Spectroscopy (FTIR). Natural river sand was used as aggregates in both mortar samples which is apparent from the particle shapes of the sieved fractions. There was also no evidence of sea shells, broken potteries, brick fragments and bulk unburned limestone used as aggregates in any of the mortar samples tested. The binder portion is mainly calcitic or calcium carbonate (CaCO3) based on the FTIR spectra and was shown to be removed by hydrochloric acid digestion. Titration method using ethylenediaminetetraacetic acid (EDTA) was employed to determine the amount of calcium in the acid soluble fractions. The percentage of calcium for MRK-01 ranges from about 1.0% to 9.5%, while MRK-02 ranges from about 2.3% to 16.8%, respectively. These percentages indicate that MRK-02 was manufactured with more lime binder compared to MRK-01. From this study, a simple method of understanding the composition of old lime mortars in the Philippines was established, which is useful for general heritage conservation work.
Pengaruh Agen Pencangkok Heparin terhadap Kemampuan Transpor Kreatinin dan Urea Membran Turunan Kitosan Fathur Al Baani; Retno Ariadi Lusiana; Muhammad Cholid Djunaidi
Jurnal Kimia Sains dan Aplikasi Vol 20, No 2 (2017): Volume 20 Issue 2 Year 2017
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (370.795 KB) | DOI: 10.14710/jksa.20.2.92-94

Abstract

Immersi heparin dilakukan pada membran kitosan untuk menambah sisi aktif membran, pada proses transpor urea. Dari data analisis didapatkan terjadi peningkatan persentase transpor urea dari 17,57 % menjadi 27,09 % dengan adanya penambahan heparin.
Effect of ZnO Dopant on TiO2 on Simultaneous Decrease of Phenol, Pb(II) and COD using Photocatalysis Method Steffita Rahayuning Purbandini; Abdul Haris
Jurnal Kimia Sains dan Aplikasi Vol 21, No 1 (2018): Volume 21 Issue 1 Year 2018
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (506.03 KB) | DOI: 10.14710/jksa.21.1.34-38

Abstract

A study entitled the effect of ZnO dopant on TiO2 on the decrease in phenol, Pb (II), and COD levels simultaneously has been performed. This study aims to synthesize TiO2 and TiO2/ZnO composites, to determine the character of TiO2/ZnO, and to measure the activity of TiO2/ZnO and TiO2 composites on the degradation of phenol wastes, decrease of Pb (II) and COD concentration. The method used was photocatalysis with TiO2 and with TiO2/ZnO. The characterization of TiO2/ZnO composites was analyzed using SEM-EDS. Photocatalysis was measured using a time variable of 1-4 hours with UV light. In photocatalysis using TiO2/ZnO composite, it was found that the maximum reduction of phenol, Pb (II), and COD concentrations occurred at the time of photocatalysis for 4 hours.
Sintesis dan Karakterisasi Katalis Pd/Ce/Zeolit Taslimah, Taslimah; Prayitno, Tono Eko; Sumardjo, Damin; Anwar, Chairil
Jurnal Kimia Sains dan Aplikasi Vol 7, No 3 (2004): Volume 7 Issue 3 Year 2004
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (216.399 KB) | DOI: 10.14710/jksa.7.3.68-71

Abstract

Telah dilakukan sintesis katalis Pd/Ce/Zeolit, sintesis dilakukan dengan cara impregnasi larutan garam palladium dan serium pada zeolit , kalsinasi dilakukan pada suhu 600 ºC dengan dialiri N2 selama 4 jam kemudian O2 selama 1 jam selanjutnya direduksi dengan H2 pada 900 ºC selama 5 jam. Karakterisasi katalis dilakukan dengan menggunakan difraktometer sinar-X dan uji katalitik dilakukan terhadap umpan gas CO, banyaknya CO yang terkonversi ditentukan dengan kromatografi gas. Disimpulkan bahwa spesies logam yang terbentuk adalah Pd(0), PdO, PdO2, Ce2O3,dan Ce6O11. Katalis Pd/Ce/zeolit pada konsentrasi Ce 3 % adalah yang terbaik mempunyai ukuran partikel PdO/ Ce2O3 279,09/263,69 dengan kemampuan konversi terhadap gas CO 78,789 % pada suhu 700 ºC.
Penyisihan Bahan Organik Alami pada Desalinasi Air Rawa Asin Menggunakan Proses Koagulasi-Pervaporasi Aulia Rahma; Muthia Elma; Mahmud Mahmud; Chairul Irawan; Amalia Enggar Pratiwi; Erdina Lulu Atika Rampun
Jurnal Kimia Sains dan Aplikasi Vol 22, No 3 (2019): Volume 22 Issue 3 Year 2019
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3226.511 KB) | DOI: 10.14710/jksa.22.3.85-92

Abstract

The high number of natural organic matter contain in wetland water may cause its water has brown color and not consumable. In other hand, intrusion of sea water through wetland aquifer create water become saline, notably on hot season. Coagulation is effective method to applied for removing of natural organic matter. However, it could not be used for salinity removal. Hence combination of coagulation and pervaporation process is attractive method to removing both of natural organic matter and conductivity of wetland saline water. The objective of this works is to investigate optimum coagulant doses for removing organic matter by coagulation process as pretreatment and to analysis performance of coagulation-pervaporation silica-pectin membrane for removing of organic matter and conductivity of wetland saline water. Coagulation process in this work carried out under varied aluminum sulfate dose 10-60 mg.L-1. Silica-pectin membrane was used for pervaporation process at feed temperature ~25 °C (room temperature). Optimum condition of pretreatment coagulation set as alum dose at 30 mg.L-1 with maximum removal efficiency 81,8 % (UV254) and 40 % (conductivity). In other hand, combining of coagulation-pervaporation silica-pectin membrane shows both of UV254 and salt rejection extremely good instead without pretreatment coagulation of 86,8 % and 99,9 % for UV254 and salt rejection respectively. Moreover, water flux of silica-pectin membrane pervaporation with coagulation pretreatment shown higher 17,7 % over water flux of wetland saline water without pretreatment coagulation. Combining of coagulation and pervaporation silica-pectin membrane is effective to removing both of organic matter and salinity of wetland saline water at room temperature.
Pengaruh Penambahan Serbuk Titanium Dioksida (TiO2) dalam Fotoelektrokatalisis Fenol dengan Elektroda PbO2/Pb Ardi Ariawan; Muhammad Cholid Djunaidi; Didik Setiyo Widodo
Jurnal Kimia Sains dan Aplikasi Vol 14, No 3 (2011): Volume 14 Issue 3 Year 2011
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (442.795 KB) | DOI: 10.14710/jksa.14.3.64-68

Abstract

Fenol merupakan salah satu pencemar perairan yang beracun, dapat terakumulasi dan stabil. Salah satu metode yang efektif untuk mendegradasi fenol adalah fotoelektrokatalisis. Tujuan dari penelitian ini adalah untuk mendegradasi fenol dengan metode fotoelektrokatalisis menggunakan elektroda PbO2/Pb, mengetahui pengaruh penambahan TiO2dan membandingkan metode fotoelektrokatalisis dengan fotokatalisis dalam degradasi fenol. Larutan fenol 100 mL dielektrolisis dengan potensial 5 V selama 8 jam dan ditambah 0,8 g TiO2 dan dipapar sinar UV. Kemudian larutan sampel dianalisis dengan spektrometer UV-Vis. Untuk memperoleh potensial kerja dilakukan elektrolisis terhadap blanko (akuades ditambahkan Na2SO4 berlebih). Setelah itu dilakukan variasi potensial, variasi waktu fotoelektrokatalisis hingga 10 jam serta variasi penambahan TiO2 hingga 1,0 g. Penambahan TiO2 sebanyak 0,8 g pada fotoelektrokatalisis fenol menaikkan persentase degradasi fenol dari 79,31% menjadi 94,05%. Degradasi fenol ditunjukkan dengan terjadinya penurunan absorbansi pada panjang gelombang 270 nm. Metode fotoelektrokatalisis lebih efektif dalam mendegradasi fenol dalam larutan daripada fotokatalisis.
Modifikasi Zeolit Alam untuk Adsorben Arnelli, Arnelli; Arthono, Thonang
Jurnal Kimia Sains dan Aplikasi Vol 5, No 1 (2002): Volume 5 Issue 1 Year 2002
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2517.831 KB) | DOI: 10.14710/jksa.5.1.8-11

Abstract

Modifikasi zeolit alam telah dilakukan untuk mendapatkan material yang lebih aktif dan baik untuk digunakan sebagai adsorben. Adsorbat yang telah diperlakukan dengan zeolit aktif tersebut adalah anion ( NO3-; NO2-; CN-; Cl- dan SO42-) dan senyawa organik (Na Asetat, O-kreseol, Asam asetat dan pati). Hasil penelitian memperlihatkan bahwa untuk memperoleh zeolit yang dapat menyerap anion perlu kalsinasi pada suhu 550°C dan untuk menyerap senyawa organik, kalsinasi hanya pada suhu 300°C. Proses adsorpsi dipengaruhi oleh jenis adsorben dan adsorbat.
Pembuatan dan Karakterisasi Elektrolit Padat NaMn2-xMgxO4 : (I) Linda Suyati; Rahmad Nuryanto; Rahmaniar Anggrayni
Jurnal Kimia Sains dan Aplikasi Vol 13, No 1 (2010): Volume 13 Issue 1 Year 2010
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (482.377 KB) | DOI: 10.14710/jksa.13.1.1-3

Abstract

Telah dilakukan penelitian tentang pembuatan elektrolit padat NaMn2-xMgxO4. Material padat dengan ion logam sebagai sumber energi merupakan temuan baru yang diterapkan. Hal ini disebabkan karena material tersebut tidak menyebabkan kebocoran elektrolit sebagaimana elektrolit cair. Pada elektrolit padat semakin rapi struktur dan semakin kompak akan semakin baik konduktivitasnya sementara semakin tinggi konsentrasi elektrolit maka semakin sulit menghantarkan elektron. Pembuatan kristal NaMn2-xMgxO4 dilakukan dengan pencampuran Na asetat, Mn asetat dengan variasi Na asetat 0,1 ; 0,2 ;0,3 ;0,4 dan 0,5 M dengan Mn asetat dan Mg asetat 0,3 M . Hasil padatan kemudian diukur hambatannya dan dihitung konduktivitasnya. Hasil penelitian menunjukkan bahwa padatan yang terbentuk berbentuk kristal dan semakin tinggi konsentrasi larutan Na ,maka konduktivitasnya cenderung semakin menurun.
Study of Equilibrium and Kinetics of Pb(II) in Solution Using Persimmon Tannin Gel as an Adsorbent Thamrin Azis; La Ode Ahmad; Fajrin E. Rosa; Laode Abdul Kadir
Jurnal Kimia Sains dan Aplikasi Vol 22, No 6 (2019): Volume 22 Issue 6 Year 2019
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2441.421 KB) | DOI: 10.14710/jksa.22.6.310-316

Abstract

Heavy metals concentrations exceeding the recommended threshold are hazardous for the environment, so there is a need for handling it safely. The purpose of this research was to determine the adsorption capacity and kinetics of adsorption. This research uses an adsorption method in the process of removing Pb(II) heavy metal ions using persimmon tannin gel. Besides the influence of contact time, pH, and the concentration of Pb(II) metal ions on adsorption, a kinetics study was also carried out. The adsorption rate is obtained through the adsorption rate constant (K) and the reaction order generated from the kinetics model. Based on the results of the research, showed the optimum adsorption process, which is 20 minutes and at a pH of 5. The maximum adsorption capacity of 17.62 mg/g with the value of the standard energy changes of Gibbs adsorption (-ΔG° = -14.274 kJ/moll) indicates that the adsorption takes place through physical interaction. The kinetic adsorption gives the adsorption rates a constant of, k = 0.008231 g/mg.min.

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